Migrate ReactHost / ReactInstanceManager destroy() call sites to use …

…invalidate() (facebook#45082)

Summary:
Pull Request resolved: facebook#45082

Changelog: [Android][Breaking] `ReactNativeHost` invalidates the instance manager on `clear()`

Changes `ReactNativeHost.clear()` to invalidate the underlying `ReactInstanceManager`, rather than merely destroying the instance.

This is technically a **breaking change** because the underlying `ReactInstanceManager` may have escaped (via `ReactNativeHost.getReactInstanceManager()`) before the `clear()` call. In my reading of the API and of usages like [this one in Expo](https://github.com/expo/expo/blob/23a905b17065703882ebeda1fc9f65a05cc69fa7/packages/expo-dev-menu-interface/android/src/main/java/expo/interfaces/devmenu/ReactHostWrapper.kt#L117), this should rarely occur in practice.

The plan:
1. D58811090: Add the basic `invalidate()` functionality.
2. **[This diff]**: Add `invalidate()` call sites where it makes sense in core.
3. [Upcoming diff]: Keep the Fusebox debugging target registered until the Host is explicitly invalidated.

Reviewed By: javache

Differential Revision: D58811091

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/ReactNativeHost.java

@@ -43,7 +43,13 @@ protected ReactNativeHost(Application application) {
     mApplication = application;
   }
 
-  /** Get the current {@link ReactInstanceManager} instance, or create one. */
+  /**
+   * Get the current {@link ReactInstanceManager} instance, or create one.
+   *
+   * <p>NOTE: Care must be taken when storing this reference outside of the ReactNativeHost
+   * lifecycle. The ReactInstanceManager will be invalidated during {@link #clear()}, and may not be
+   * used again afterwards.
+   */
   public ReactInstanceManager getReactInstanceManager() {
     if (mReactInstanceManager == null) {
       ReactMarker.logMarker(ReactMarkerConstants.INIT_REACT_RUNTIME_START);
@@ -64,11 +70,12 @@ public boolean hasInstance() {
   }
 
   /**
-   * Destroy the current instance and release the internal reference to it, allowing it to be GCed.
+   * Destroy the current instance and invalidate the internal ReactInstanceManager, reclaiming its
+   * resources and preventing it from being reused.
    */
   public void clear() {
     if (mReactInstanceManager != null) {
-      mReactInstanceManager.destroy();
+      mReactInstanceManager.invalidate();
       mReactInstanceManager = null;
     }
   }